/Engine/Source/Editor/Layers/Public/LayersDragDropOp.h
Drag/drop operation for dragging layers in the editor
class FLayersDragDropOp : public [FDecoratedDragDropOp](API\Editor\UnrealEd\DragAndDrop\FDecoratedDragDropOp)
TArray<FName>
Layers
The names of the layers being dragged